Foreigners reveal the things they find strangest about traveling in America

INSIDER People around the world like to give the US a hard time -- they like to make fun of their accents, they're bewildered by the many friendly smiles, and overactive air conditioners are a great source of concern (and cold). But stereotypes aside, what are the real-life American quirks that shock foreigners? We looked at a recent Reddit thread that had non-Americans share the strangest things they learned about the US after visiting. American portion sizes are bewildering to foreigners INSID...